Construction employees reported the concrete crusher missing three weeks after it was last seen. It’s not clear when exactly it was stolen, Morris County Sheriff’s office said in a CrimeStoppers bulletin.

Because concrete crushers are the type of equipment that aren’t used daily and get transferred from site to site, it’s not unusual that its disappearance went unnoticed for so long, police said.

“It could be the kind of thing where someone said, ‘hey, where’s that rock crusher, I haven’t seen it since whatever date’,” Shearer said.

It could be a pricey loss for the construction company. The crusher, a 2017 Eagle Ultra Max, is valued at $415,000, Shearer said. Newer models, even when used, can go for over $600,000.

The concrete crusher can’t be driven on the roads like a normal car. Instead, it’s transported from job-to-job on the back of a trailer, Shearer said. It could still have a transit plate with registration 13EU on the body of the trailer.

Shearer said it’s likely the thief has construction knowledge.

There is a reward for the missing crusher. Morris County Sheriff’s CrimeStoppers is offering up to $1,000 for information on the theft. Anyone with knowledge is asking to call 973-COP-CALL, or visit www.copcall.org to make an anonymous report.